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Programmable Resolution 1-Wire Digital Thermometer

High-Precision Temperature Monitoring with Minimal Connections Ideal for Multisensor Systems

Product Details

Key Features

Parametric specs for Temperature Sensors
Sensor Type Local
# Channels One
Interface 1-Wire
Accuracy (±°C) 0.5
Parasite Pwr. Yes
Temp. Thresh. Programmable (NV)
Temp. Resolution (bits) 9
10
11
12
Oper. Temp. (°C) -55 to +125
Package/Pins SOIC (N)/8
TO92/3
UMAX/8
Budgetary
Price (See Notes)
2.09
View Less

Simplified Block Diagram

Technical Docs

Data Sheet Programmable Resolution 1-Wire Digital Thermometer Aug 09, 2019
App Note How to Get Data Out of Your Favorite Sensors
App Note Simple Software Validates the Hardware CRC and Detects Errors in the Serial Bit Stream of 1-Wire® Thermal Devices
App Note How to Use Packet-Error Checking to Secure Your Temperature Reading
App Note Wirelessly Powering and Accessing a 1-Wire Network
App Note 1-Wire Protocol PDF of DS18S20 vs DS18B20 Digital Themormeters | Maxim Integrated
App Note Getting Started with the MAXQ2000 USB Thumb Evaluation Kit
App Note Understanding the DS1WM Synthesizable 1-Wire Bus Master
App Note Single-Wire Serial Bus Carries Isolated Power and Data
App Note Package Thermal Resistance Values (Theta JA, Theta JC) for Temperature Sensors and 1-Wire Devices
App Note 1-Wire Master Device Configuration
App Note 1-Wire Communication with a Microchip PICmicro Microcontroller
App Note Curve Fitting the Error of a Bandgap-Based Digital Temperature Sensor
App Note Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
App Note 1-Wire® Tagging with XML
App Note 1-Wire Communication Through Software | Maxim Integrated
App Note Using Dallas' 1-Wire ICs in 1-Cell Li-Ion Battery Packs With Low-Side N-Channel Safety FETs Master
App Note White Paper 5: Using 1-Wire APIs for Data Sheet Commands
App Note Using the DS2480B Serial 1-Wire® Line Driver
App Note 1-Wire Search Algorithm
App Note Interfacing the DS18X20/DS1822 1-Wire® Temperature Sensor in a Microcontroller Environment
Tutorial Overview of Sensor Signal Paths
Tutorial Introduction to Medical Instruments and Growing Trend for Point-of-Care and Near-Patient Testing
Tutorial Thermal Management Handbook
Tutorial How to Power the Extended Features of 1-Wire® Devices

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Parameters

Parametric specs for Temperature Sensors
Sensor Type Local
# Channels One
Interface 1-Wire
Accuracy (±°C) 0.5
Parasite Pwr. Yes
Temp. Thresh. Programmable (NV)
Temp. Resolution (bits) 9
10
11
12
Oper. Temp. (°C) -55 to +125
Package/Pins SOIC (N)/8
TO92/3
UMAX/8
Budgetary
Price (See Notes)
2.09

Key Features

  • Unique 1-Wire® Interface Requires Only One Port Pin for Communication
  • Reduce Component Count with Integrated Temperature Sensor and EEPROM
    • Measures Temperatures from -55°C to +125°C (-67°F to +257°F)
    • ±0.5°C Accuracy from -10°C to +85°C
    • Programmable Resolution from 9 Bits to 12 Bits
    • No External Components Required
  • Parasitic Power Mode Requires Only 2 Pins for Operation (DQ and GND)
  • Simplifies Distributed Temperature-Sensing Applications with Multidrop Capability
    • Each Device Has a Unique 64-Bit Serial Code Stored in On-Board ROM
  • Flexible User-Definable Nonvolatile (NV) Alarm Settings with Alarm Search Command Identifies Devices with Temperatures Outside Programmed Limits
  • Available in 8-Pin SO (150 mils), 8-Pin µSOP, and 3-Pin TO-92 Packages

Applications/Uses

  • Consumer Products
  • Industrial Systems
  • Thermally Sensitive Systems
  • Thermometers
  • Thermostatic Controls

Description

The DS18B20 digital thermometer provides 9-bit to 12-bit Celsius temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points. The DS18B20 communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. In addition, the DS18B20 can derive power directly from the data line ("parasite power"), eliminating the need for an external power supply.

Each DS18B20 has a unique 64-bit serial code, which allows multiple DS18B20s to function on the same 1-Wire bus. Thus, it is simple to use one microprocessor to control many DS18B20s distributed over a large area. Applications that can benefit from this feature include HVAC environmental controls, temperature monitoring systems inside buildings, equipment, or machinery, and process monitoring and control systems.


How to Spatially Index 1-Wire® Sensors Using the MAXREFDES131 and DS18B20

FAQs: DS18B20

Simplified Block Diagram

DS18B20: Block Diagram DS18B20: Block Diagram Zoom icon

Technical Docs

Data Sheet Programmable Resolution 1-Wire Digital Thermometer Aug 09, 2019
App Note How to Get Data Out of Your Favorite Sensors
App Note Simple Software Validates the Hardware CRC and Detects Errors in the Serial Bit Stream of 1-Wire® Thermal Devices
App Note How to Use Packet-Error Checking to Secure Your Temperature Reading
App Note Wirelessly Powering and Accessing a 1-Wire Network
App Note 1-Wire Protocol PDF of DS18S20 vs DS18B20 Digital Themormeters | Maxim Integrated
App Note Getting Started with the MAXQ2000 USB Thumb Evaluation Kit
App Note Understanding the DS1WM Synthesizable 1-Wire Bus Master
App Note Single-Wire Serial Bus Carries Isolated Power and Data
App Note Package Thermal Resistance Values (Theta JA, Theta JC) for Temperature Sensors and 1-Wire Devices
App Note 1-Wire Master Device Configuration
App Note 1-Wire Communication with a Microchip PICmicro Microcontroller
App Note Curve Fitting the Error of a Bandgap-Based Digital Temperature Sensor
App Note Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
App Note 1-Wire® Tagging with XML
App Note 1-Wire Communication Through Software | Maxim Integrated
App Note Using Dallas' 1-Wire ICs in 1-Cell Li-Ion Battery Packs With Low-Side N-Channel Safety FETs Master
App Note White Paper 5: Using 1-Wire APIs for Data Sheet Commands
App Note Using the DS2480B Serial 1-Wire® Line Driver
App Note 1-Wire Search Algorithm
App Note Interfacing the DS18X20/DS1822 1-Wire® Temperature Sensor in a Microcontroller Environment
Tutorial Overview of Sensor Signal Paths
Tutorial Introduction to Medical Instruments and Growing Trend for Point-of-Care and Near-Patient Testing
Tutorial Thermal Management Handbook
Tutorial How to Power the Extended Features of 1-Wire® Devices

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .